MT 221-1991
Explosion-proof lamps for coal mines (English Version)

Standard No.

MT 221-1991

Language

Chinese, Available in English version

Release Date

1991

Published By

Professional Standard - Coal

Status

Be replaced 2005-06

Replace By

MT 221-2005

Latest

MT 221-2005

MT 221-1991 history

• 2005 MT 221-2005 Explosion proof lamp for coal mine
• 1991 MT 221-1991 Explosion-proof lamps for coal mines